Buildings.Fluid.Geothermal.Borefields.Data.Configuration

Collection of records of configuration data of borefields

Information

This package contains data records for use with ground heat exchanger models in Buildings.Fluid.Geothermal.Borefields. The configuration data records contain the geometrical and operational characteristics of the borefield and the boreholes.

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

Package Content

Name	Description
Example	Example definition of a configuration data record
Template	Template for configuration data records

Buildings.Fluid.Geothermal.Borefields.Data.Configuration.Example

Example definition of a configuration data record

Information

This record presents an example for how to define configuration data records using the template in Buildings.Fluid.Geothermal.Borefields.Data.Configuration.Template.

Extends from Buildings.Fluid.Geothermal.Borefields.Data.Configuration.Template (Template for configuration data records).

Parameters

Type	Name	Default	Description
BoreholeConfiguration	borCon	Types.BoreholeConfiguration....	Borehole configuration
Boolean	use_Rb	false	true if the value borehole thermal resistance Rb should be given and used
Real	Rb	0.0	Borehole thermal resistance Rb. Only to fill in if known [(m.K)/W]
Nominal condition
MassFlowRate	mBor_flow_nominal	0.3	Nominal mass flow rate per borehole [kg/s]
MassFlowRate	mBorFie_flow_nominal	mBor_flow_nominal*nBor	Nominal mass flow of borefield [kg/s]
Pressure	dp_nominal	5e4	Pressure losses for the entire borefield [Pa]
Borehole
Height	hBor	100.0	Total height of the borehole [m]
Radius	rBor	0.075	Radius of the borehole [m]
Height	dBor	1.0	Borehole buried depth [m]
Integer	nBor	size(cooBor, 1)	Total number of boreholes
Length	cooBor[:, 2]	{{0,0},{0,6},{6,0},{6,6}}	Cartesian coordinates of the boreholes in meters [m]
Tubes
Radius	rTub	0.02	Outer radius of the tubes [m]
ThermalConductivity	kTub	0.5	Thermal conductivity of the tube [W/(m.K)]
Length	eTub	0.002	Thickness of a tube [m]
Length	xC	0.05	Shank spacing, defined as the distance between the center of a pipe and the center of the borehole [m]
Advanced
MassFlowRate	mBor_flow_small	1E-4*abs(mBor_flow_nominal)	Small mass flow rate for regularization of zero flow [kg/s]

Modelica definition

record Example "Example definition of a configuration data record" extends Buildings.Fluid.Geothermal.Borefields.Data.Configuration.Template( borCon = Types.BoreholeConfiguration.SingleUTube, cooBor={{0,0},{0,6},{6,0},{6,6}}, mBor_flow_nominal=0.3, dp_nominal=5e4, hBor=100.0, rBor=0.075, dBor=1.0, rTub=0.02, kTub=0.5, eTub=0.002, xC=0.05); end Example;

Buildings.Fluid.Geothermal.Borefields.Data.Configuration.Template

Template for configuration data records

Information

This record is a template for the records in Buildings.Fluid.Geothermal.Borefields.Data.Configuration.

Extends from Modelica.Icons.Record (Icon for records).

Parameters

Type	Name	Default	Description
BoreholeConfiguration	borCon		Borehole configuration
Boolean	use_Rb	false	true if the value borehole thermal resistance Rb should be given and used
Real	Rb	0.0	Borehole thermal resistance Rb. Only to fill in if known [(m.K)/W]
Nominal condition
MassFlowRate	mBor_flow_nominal		Nominal mass flow rate per borehole [kg/s]
MassFlowRate	mBorFie_flow_nominal	mBor_flow_nominal*nBor	Nominal mass flow of borefield [kg/s]
Pressure	dp_nominal		Pressure losses for the entire borefield [Pa]
Borehole
Height	hBor		Total height of the borehole [m]
Radius	rBor		Radius of the borehole [m]
Height	dBor		Borehole buried depth [m]
Integer	nBor	size(cooBor, 1)	Total number of boreholes
Length	cooBor[:, 2]		Cartesian coordinates of the boreholes in meters [m]
Tubes
Radius	rTub		Outer radius of the tubes [m]
ThermalConductivity	kTub		Thermal conductivity of the tube [W/(m.K)]
Length	eTub		Thickness of a tube [m]
Length	xC		Shank spacing, defined as the distance between the center of a pipe and the center of the borehole [m]
Advanced
MassFlowRate	mBor_flow_small	1E-4*abs(mBor_flow_nominal)	Small mass flow rate for regularization of zero flow [kg/s]

Modelica definition

record Template "Template for configuration data records" extends Modelica.Icons.Record; parameter Buildings.Fluid.Geothermal.Borefields.Types.BoreholeConfiguration borCon "Borehole configuration"; parameter Boolean use_Rb = false "true if the value borehole thermal resistance Rb should be given and used"; parameter Real Rb(unit="(m.K)/W") = 0.0 "Borehole thermal resistance Rb. Only to fill in if known"; parameter Modelica.Units.SI.MassFlowRate mBor_flow_nominal "Nominal mass flow rate per borehole"; parameter Modelica.Units.SI.MassFlowRate mBorFie_flow_nominal= mBor_flow_nominal*nBor "Nominal mass flow of borefield"; parameter Modelica.Units.SI.Pressure dp_nominal(displayUnit="Pa") "Pressure losses for the entire borefield"; //------------------------- Geometrical parameters --------------------------- parameter Modelica.Units.SI.Height hBor "Total height of the borehole"; parameter Modelica.Units.SI.Radius rBor "Radius of the borehole"; parameter Modelica.Units.SI.Height dBor "Borehole buried depth"; parameter Integer nBor = size(cooBor, 1) "Total number of boreholes"; parameter Modelica.Units.SI.Length[:,2] cooBor "Cartesian coordinates of the boreholes in meters"; // -- Tube parameter Modelica.Units.SI.Radius rTub "Outer radius of the tubes"; parameter Modelica.Units.SI.ThermalConductivity kTub "Thermal conductivity of the tube"; parameter Modelica.Units.SI.Length eTub "Thickness of a tube"; parameter Modelica.Units.SI.Length xC "Shank spacing, defined as the distance between the center of a pipe and the center of the borehole"; //------------------------- Advanced parameters ------------------------------ /*--------Flow: */ parameter Modelica.Units.SI.MassFlowRate mBor_flow_small(min=0) = 1E-4*abs( mBor_flow_nominal) "Small mass flow rate for regularization of zero flow"; end Template;